Autotroph Inquiries: Comings and Goings? What do Plants Need/Use/Consume? What do Plants Give Off? Consider these questions: What do plants need to live? What do they need to go through the process of photosynthesis? Draw a T-chart, like below, and fill it in with as many ideas as you can. Don’t worry about being right or wrong. The purpose at this is to find out what you know before studying photosynthesis. What Plants Need

Based on what you wrote, try writing a summary equation for photosynthesis. On the left of the arrow put the things are needed for photosynthesis and to the right of the arrow put the things that come out of the process. Again don’t worry about being right or wrong. ______________

Consider these Questions: Do plants consume Carbon Dioxide (CO 2 ) or release it when they are in the light, photosynthesizing? What is your evidence for this? Do plants consume or release Oxygen (O 2 ) during photosynthesis? What is the purpose of photosynthesis?

Modeling Photosynthesis DO NOT EAT THE CEREAL!!!

Before You Begin 1.Draw a leaf in your ISN. Make it large. Have it take up most of the page. 2.Use arrows to show the materials that enter the leaf cells during photosynthesis. Label the arrows. 3.Use arrows to show the materials that leave and/or stay in the leaf during photosynthesis. Label the arrows. 4.Try this on your own and then I’ll show you an example.

Photosynthesis glucose Carbon dioxide water sunlight oxygen In the chloroplast using chlorophyll

Directions 1.From the container of cereal: Count out 18 of the same color pieces and place them in a pile on the plate. The plate will represent a leaf for this activity. Count 12 of another color. Count 6 of another color. 2.Create this chart in your ISN and fill in the colors. Cereal Color# of Pieces Atoms Represented 18Oxygen (O) 12Hydrogen (H) 6Carbon (C)

Directions 1.Make a water molecule (H 2 O). 2.Make a carbon dioxide molecule (CO 2 ). 3.Continue making water and carbon dioxide molecules until all atoms (cereal pieces) are used up.

Answer the following questions in your ISN in COMPLETE sentences 1.How many molecules (clusters) of water (H 2 O) were you able to make? 2.How many molecules of carbon dioxide (CO 2 ) were made? 3.Write and complete the following sentence on the bottom of your paper: The reactants (items used) of photosynthesis are…

Reaction Time Energy from sunlight is needed to break the bonds which hold atoms together in the water and carbon dioxide molecules. Gently shake the leaf (plate) to mix up the cereal pieces, making sure to keep all the pieces on the leaf.

Directions Now simulate photosynthesis by recombining the atoms to form both the food and waste of plant cells. Use the same cereal pieces to make a simple sugar molecule called glucose (C 6 H 12 O 6 ).Use the same cereal pieces to make a simple sugar molecule called glucose (C 6 H 12 O 6 ). With the remaining pieces, put together pairs of oxygen atoms (O 2 ).With the remaining pieces, put together pairs of oxygen atoms (O 2 ).

Answer the following questions in your ISN in COMPLETE sentences. 4. How many oxygen (O 2 ) molecules did you make? 5. How many glucose (C 6 H 12 O 6 ) molecules did you make? 6. Write and complete the following sentence on your paper: The products (items made) of photosynthesis are…

How many of each kind of atom are in the reactants? Oxygen = Hydrogen = Carbon = How many of each kind of atom are in the products? Oxygen = Hydrogen = Carbon = Summary (use to fill out the chart)

How many of each kind of atom are in the reactants? Oxygen = 18 Hydrogen = 12 Carbon = 6 How many of each kind of atom are in the products? Oxygen = 18 Hydrogen = 12 Carbon = 6 Summary

Answer the questions in your ISN in COMPLETE sentences. 7. How do the total number of reactants and products compare? 8. Which of the reactants and products are organic? 9. In nature, where does the energy to break and make bonds come from?

Answer the following questions in your ISN in COMPLETE sentences. 10. During photosynthesis, light is changed to chemical energy. In which product is the chemical energy stored? What is its purpose? 11. What must be present in plant cells in order for photosynthesis to occur?

Answer the following questions in your ISN in COMPLETE sentences. Application 12. If something occurred which destroyed all the green plants on Earth, what effect would this have on other organisms? Why? Now write the chemical equation for photosynthesis!

the chemical equation for photosynthesis:the chemical equation for photosynthesis: H 2 O + CO 2 + light  O 2 + C 6 H 12 O 6 Water+ Carbon + sun  Oxygen + glucose Dioxide(sugar)